Safety interlink assembly of liquid agent ejection device

ABSTRACT

A safety interlink assembly of a liquid agent ejection device has a receiving chamber and a seat. An elastic body with a liquid agent is installed in the receiving chamber. The seat has an impact unit limited by a safety interlink assembly with two stage movements. The safety interlink assembly has a safety key installed on the top of the receiving chamber, a slidable rod limited by the safety key and a linking rod connected to the safety interlink assembly, and a bolt. The bolt buckles the impact unit and changes a position thereof by which the slidable rod moves backwards to drive the linking rod. The stress of the spring at the back end of the impact unit pushes forwards to impact the elastic body so that the liquid agent of the elastic body is sprayed out strongly from the receiving chamber.

FIELD OF THE INVENTION

The present invention relates to safety interlink assemblies, inparticular a safety interlink assembly applied in a liquid agentejection device.

DESCRIPTION OF THE PRIOR ART

A personal sprayed gun of a prior art in the current market has the samedesign as a pesticide sprayed device. After a spraying head of thepersonal sprayed gun is pushed down, the liquid agent thereof is sprayedout because of extruding force so as to threaten violators and assure ofpersonal safety. However, the personal sprayed gun of the prior art hasseveral defects, such as a short gunshot suitable only for a shorterdistance protection, and an uncontrollable spayed direction thereofcaused by wind. Furthermore, the liquid of the prior art may be sprayedon a user when a violator is close to the user and the sprayed gun isoperated. Therefore, the protecting function of the sprayed gun is notwell qualified.

Another personal anti-violating device is a percussion style. Thepersonal anti-violating device has basically a receiving chamber and aseat. The receiving chamber has an elastic body with a liquid agent. Theseat has an impact unit. A user is capable of pushing down an ejectionkey for moving an interior axial and linking rod so that the impact unitof the seat pushes forwards to impact the elastic body in the receivingchamber. The liquid agent of the elastic body is extruded out andsprayed outwards so as to reach an anti-violating goal. Comparing to thepersonal sprayed gun, the personal anti-violating device is capable ofovercoming these defects, including shorter gunshot distance and anuncontrollable spayed direction thereof caused by wind.

However, an operation of the personal anti-violating device is neededonly to push an ejection key for driving thereof and then the impactunit is capable of impact an elastic body for ejecting the liquid agent.Therefore, the operation is easy to be driven by pushing an ejecting keydown by mistake or incaution. In the situation, the personalanti-violating device may not protect a user in an emergency moment andfurthermore endanger the user whiling the user taking along thereof.Besides, the personal anti-violating device has several defects, such asa complex design, a higher cost and unpopularity in the current marketthereof.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a safetyinterlink assembly of a liquid agent ejection device. The liquid agentejection device is popularly also called to be a personal riot device.The movement of the safety interlink assembly is separated by differentstages continuously. The safety interlink assembly with different stagesis operated only by one single finger and has an advantage ofwell-function.

The secondary object of the present invention is to provide the safetyinterlink assembly for preventing from wrong operation. The safetyinterlink assembly is safer, because the action with different stages ofthe safety interlink assembly makes sure that the elastic body will notbe struck whiling a user pushing a safety key down by mistake.

The third object of the present invention is to improve the front endstructure of a receiving chamber of the liquid agent ejection device soas to prevent from the liquid agent permeating backwards or droppingoutwards thereof.

Comparing to main functions of prior arts, the present invention isimproved in many ways. For instance, comparing to a spray gun of a priorart, the present invention has multi-protection functions. The sprayedliquid of the present invention is not easy to be dispersed by blowingwind so that the present invention is capable of threatening a violatorat a windy emergency moment. For another example, comparing to apersonal protecting device of a prior art, the present invention has ahigher reliability and safety. Besides, the present invention isoperated only by single one finger with several advantages, such as asimple structure, a convenient operation and a lower manufacture cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an outer view of the liquid agent ejection device of thepresent invention.

FIG. 2 is a partial cross-sectional view for showing the safetyinterlink assembly and the interior structure of the present invention.

FIG. 3 is an outer lateral view of a preparing state of the presentinvention.

FIG. 4 is a partial cross-sectional view for showing a preparing stateof safety interlink assembly.

FIG. 5 is an outer lateral view of an operating state of the presentinvention.

FIG. 6 is a partial cross-sectional for showing an operating state ofthe safety interlink assembly.

FIG. 7 is illustrated with a combination which one liquid agent ejectiondevice is connected to another liquid agent ejection device.

FIG. 8 is a cross-sectional view of FIG. 7.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In order that those skilled in the art can further understand thepresent invention, a description will be provided in the following indetails. However, these descriptions and the appended drawings are onlyused to cause those skilled in the art to understand the objects,features, and characteristics of the present invention, but not to beused to confine the scope and spirit of the present invention defined inthe appended claims.

Referring to FIGS. 1 and 2, a liquid agent ejection device 1 of thepresent invention has two major devices, including a receiving chamber10 and a seat 20. An operating device of a safety interlink assembly 30is on the exterior part of the receiving chamber 10. The operatingdevice has a safety key 32 and a slidable rod 34 for limiting by thesafety key 32. The interior part of the seat 20 has an impact unit 22 toform an actuating unit. A main action is that when the stress of thespring 24 is applied to the impact unit 22, it will move forwards togenerate a strong impact. Besides, the receiving chamber 10 is installedin an elastic body 40. The back end of the elastic body 40 forms as aninflation chamber 42. The inflation chamber 42 is filled with medicinematerial. The front end of the elastic body 40 is filled with liquid.The impact unit 22 of the seat 20 is pushed forwards by the stress ofthe spring 24 to form a fast strong impact. The impact causes themedicine material to function in the back inflation chamber 42 of theelastic body 40 so that the chemical function will bring a strong forceto extrude the liquid agent. A strong internal pressure thereof breaksthrough the front end of the elastic body 40 so that the liquid agent issprayed out strongly from an ejection opening 16.

The present invention has a check assembly. The check assembly includesa pad 12 at a reserved position of the receiving chamber 10 and areceiving groove 14. The pad 12 of the elastic unit is combined with theelastic body 40 and instated at the front end of the elastic body 40.The reserved position is also at the steeped surface of the interiorbetween the elastic body 40 and the receiving chamber 10. The reservedposition of the pad 12 could be also installed circularly at the walledge of the stepped surface corresponding to the interior shape of thereceiving chamber 10. Thereby, the pad 12 is capable of isolating aninterval between the elastic body 40 and the receiving chamber 10 to theejection opening 16. When the impact unit 22 is impacted, the liquidagent is sprayed out strongly. The pad 12 is capable of preventing theliquid agent from returning along the stepped surface of he ejectionopening 16 of the liquid agent ejection device 1 through an interior ofthe receiving chamber 10 of the elastic body 40. In addition, thereceiving groove 14 is capable of preventing from the liquid agentdropping out.

Each lateral side of the present invention has a rib 182 and acombination groove 184 so that the two liquid agent ejection devices arecapable of connection together, the details thereof will be described asthe followings.

Referring to FIG. 2, FIG. 2 is a partial cross-sectional view of thepresent invention. Besides, the safety interlink assembly is illustratedwith the FIGS. 3 and 4. FIG. 3 is an outer lateral view of the presentinvention in a preparing state. FIG. 4 is a partial cross-sectional viewof the safety interlink assembly in a preparing state.

The safety interlink assembly 30 has the safety key 32 on the top of thereceiving chamber 10, a tenon 322 and an elastomer 324 under the safetykey 32. The slidable rod 34 is installed on the top of the receiving+chamber 10. The slidable rod 34 has a buckled end 342 and a linking rod344 connected to the slidable rod 34. A teethed cambered surface 346 isinstalled on the top of the buckled end 342. The back end of the linkingrod 344 has an inclined groove 348. The inclined groove 348 is limitedby the action of safety interlink assembly 30, the tenon 322 and buckledend 342. A bolt 50 is installed in the inclined groove 348 so that thebolt 50 is capable of locking the impact unit 22 and resisting themovement of the impact unit 22. The bolt 50 changes a position andreleases the impact unit 22 by moving back the slidable rod 34 to drivethe linking rod 344. Thereby, in a preparing state, a user can hold theliquid agent ejection device 1 on. Besides, the safety key 32 and theteethed cambered surface 346 of the slidable rod 34 fits in with aergonomics so that the user can operate the present invention by fingersflexibly.

The movement of the safety interlink assembly is illustratedcontinuously with FIGS. 5 and 6. FIG. 5 is an outer lateral view of theaction of the present invention. FIG. 6 is a partial cross-sectionalview of the present invention for showing the movement of the safetyinterlink assembly. The action of the safety interlink assembly 30 ofthe present invention is separated by different stages. All the stagesof the movement are needed to be operated only by a single finger of theuser. The first stage of the movement is to push the safety key 32 downso that the tenon 322 of the safety key 32 and the buckled end 342 ofthe slidable rod 34 are released from the limitation. Then the slidablerod 34 is capable of sliding backwards. The second stage of the movementis to press the teethed cambered surface 346 downwards so as to slideconveniently the slidable rod 34 backwards and thus to drive the linkingrod 344 and the inclined groove 348 at the back end thereof for movebackwards. Because the bolt 50 is installed in the inclined groove 348,the bolt 50 is moved upwards by pushing backwards the slidable rod 34and driving the linking rod 344. Thereby the bolt 50 is pushed andunlocked to release the impact unit 22. The stress of the spring 24 atthe back end of the impact unit 22 is applied to strike forwards theelastic body 40 so that the liquid agent of the elastic body 40 issprayed out strongly in the receiving chamber 10. Therefore, the presentinvention has a double-secure function so as to prevent from danger ofmisusing thereof.

Referring to FIGS. 7 and 8, FIG. 7 is illustrated with two combinationsof the liquid agent ejection devices of the present invention and FIG. 8is a cross-sectional view of FIG. 7. Each side of the present inventionhas the rib 182 and the combination groove 184. The shape of the rib 182is corresponding to the shape of the combination groove 184 so that therib 182 of a liquid agent ejection device 30 is capable of connecting toa combination groove 184′ of an adjacent liquid agent ejection device30′. Besides, the combination groove 184′ of an adjacent liquid agentejection device 30′ is capable of connecting continuously to the rib182′. The connecting function thereof is capable of endurable uses ofthe present invention or ejecting two shots of liquid agent at the sametime in an emergency.

The present invention is thus described, and it will be obvious that thesame may be varied in many ways. Such variations are not to be regardedas a departure from the spirit and scope of the present invention, andall such modifications as would be obvious to one skilled in the art areintended to be included within the scope of the following claims.

1. A safety interlink assembly of a liquid agent ejection devicecomprising: a receiving chamber having an elastic body of a liquidagent; a seat having an impact unit; wherein the impact unit is limitedby the safety interlink assembly; and the safety interlink assemblycomprising: a safety key being installed on a top of the receivingchamber; a tenon and an elastic unit under the safety key; a slidablerod being installed on a top of the receiving chamber; the slidable rodhaving a buckled end and interlinking to a linking rod; an inclinedgroove at the back end of the linking rod; a bolt being installed in theinclined groove; wherein the tenon is limited and buckled to theslidable rod; and the impact unit is buckled limitedly because theinclined groove of the linking rod fixes the bolt so that the bolt willconfine the movement of the impact unit.
 2. The safety interlinkassembly of a liquid agent ejection device as claimed in claim 1,wherein a teethed cambered surface is installed above the buckled end.3. The safety interlink assembly of a liquid agent ejection device asclaimed in claim 1, wherein each lateral side of the liquid agentejection device has a rib and a combination groove.
 4. The safetyinterlink assembly of a liquid agent ejection device as claimed in claim1, wherein the seat has a spring; the stress of the spring is applied tothe impact unit so as to the impact unit is pushed forwards to generatea fast impact force.
 5. The safety interlink assembly of a liquid agentejection device as claimed in claim 1, wherein the receiving chamber hasa pad; and the pad is capable of preventing the liquid agent frompermeating the receiving chamber while the liquid agent impacted by theimpact unit is sprayed out strongly.
 6. The safety interlink assembly ofa liquid agent ejection device as claimed in claim 1, wherein thereceiving chamber has a receiving groove; and the receiving grooveserves to prevent from leakage outwards when the liquid agent impactedby impact unit is sprayed out strongly.